package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.OrdersPaymentDTO;
import com.sky.dto.OrdersSubmitDTO;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderSubmitVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private UserMapper userMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private WeChatPayUtil weChatPayUtil;

        /**
         * 用户下单
         *
         * @param ordersSubmitDTO
         * @return
         */
        @Transactional
        public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
            //异常情况的处理（收货地址为空、购物车为空）
            AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
            if (addressBook == null) {
                throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
            }

            Long userId = BaseContext.getCurrentId();
            ShoppingCart shoppingCart = new ShoppingCart();
            shoppingCart.setUserId(userId);

            //查询当前用户的购物车数据
            List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
            if (shoppingCartList == null || shoppingCartList.size() == 0) {
                throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
            }

            //构造订单数据
            Orders order = new Orders();
            BeanUtils.copyProperties(ordersSubmitDTO, order);
            order.setPhone(addressBook.getPhone());
            order.setAddress(addressBook.getDetail());
            order.setConsignee(addressBook.getConsignee());
            order.setNumber(String.valueOf(System.currentTimeMillis()));
            order.setUserId(userId);
            order.setStatus(Orders.PENDING_PAYMENT);
            order.setPayStatus(Orders.UN_PAID);
            order.setOrderTime(LocalDateTime.now());

            //向订单表插入1条数据
            orderMapper.insert(order);

            //订单明细数据
            List<OrderDetail> orderDetailList = new ArrayList<>();
            for (ShoppingCart cart : shoppingCartList) {
                OrderDetail orderDetail = new OrderDetail();
                BeanUtils.copyProperties(cart, orderDetail);
                orderDetail.setOrderId(order.getId());
                orderDetailList.add(orderDetail);
            }

            //向明细表插入n条数据
            orderDetailMapper.insertBatch(orderDetailList);

            //清理购物车中的数据
            shoppingCartMapper.deleteByUserId(userId);

            //封装返回结果
            OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                    .id(order.getId())
                    .orderNumber(order.getNumber())
                    .orderAmount(order.getAmount())
                    .orderTime(order.getOrderTime())
                    .build();

            return orderSubmitVO;
        }

        /**
         * 订单支付
         *
         * @param ordersPaymentDTO
         * @return
         */
        public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
            // 当前登录用户id
            Long userId = BaseContext.getCurrentId();
            User user = userMapper.getById(userId);

            //调用微信支付接口，生成预支付交易单
            JSONObject jsonObject = weChatPayUtil.pay(
                    ordersPaymentDTO.getOrderNumber(), //商户订单号
                    new BigDecimal(0.01), //支付金额，单位 元
                    "苍穹外卖订单", //商品描述
                    user.getOpenid() //微信用户的openid
            );

            if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
                throw new OrderBusinessException("该订单已支付");
            }

            OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
            vo.setPackageStr(jsonObject.getString("package"));

            return vo;
        }

        /**
         * 支付成功，修改订单状态
         *
         * @param outTradeNo
         */
        public void paySuccess(String outTradeNo) {

            // 根据订单号查询订单
            Orders ordersDB = orderMapper.getByNumber(outTradeNo);

            // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
            Orders orders = Orders.builder()
                    .id(ordersDB.getId())
                    .status(Orders.TO_BE_CONFIRMED)
                    .payStatus(Orders.PAID)
                    .checkoutTime(LocalDateTime.now())
                    .build();

            orderMapper.update(orders);
        }

}